erythrocyte sedimentation rate (ESR), the rate at which red blood cells settle out in a tube of unclotted blood, expressed in millimeters per hour. Blood is collected in an anticoagulant and allowed to form a sediment in a calibrated glass column.
The Butterfly Circus (2009) The Butterfly Circus is the story of a renowned circus troupe traveling through the devastated American landscape at the height of the Great Depression, lifting the spirits of audiences ... See full summary Â».
A butterfly is a usually day-flying insect of the order Lepidoptera. They are grouped together in the suborder Rhopalocera. Butterflies are closely related to moths, from which they evolved. The life of butterflies is closely connected to flowering plants, which their larvae (caterpillars) feed on, and their adults feed and lay their eggs on.